Claims
- 1. An optical measuring apparatus, comprising
an optical scanning system for supplying to a device under test electromagnetic energy at a plurality of periodically varying wavelengths, a measuring circuit for measuring electromagnetic energy from the device under test, and a synchronizer, including a device responsive to the electromagnetic energy from the optical scanning system to provide a known response to one or more wavelengths of the electromagnetic energy to synchronize the measuring circuit with the optical scanning system.
- 2. The apparatus of claim 1, wherein the device responsive is a wavelength reference.
- 3. The apparatus of claim 2, wherein the wavelength reference device provides a specific wavelength dependent response.
- 4. The apparatus of claim 2, wherein the wavelength reference is a gas cell.
- 5. The apparatus of claim 2, wherein the wavelength reference is a Fabry Perot device.
- 6. The apparatus of claim 1, wherein the device responsive provides known absorption or transmission maxima or minima.
- 7. An optical testing instrument, comprising
a tunable illumination source for illuminating a device under test using electromagnetic energy having a wavelength that is swept over a wavelength band, a wavelength dependent transmission responsive device to determine one or more distinct wavelength points in the sweep of the illumination source, and a measuring circuit synchronized to the wavelength dependent to measure illumination from the device under test over at least a range of the wavelength band.
- 8. The instrument of claim 7, said wavelength dependent transmission responsive device comprising a gas cell.
- 9. The instrument of claim 7, said wavelength dependent transmission responsive device comprising a Fabry Perot device.
- 10. A method of testing an object using electromagnetic energy, comprising
illuminating the object using electromagnetic energy while sweeping the electromagnetic energy over a range of wavelengths, measuring electromagnetic energy from the object in response to such illuminating, coordinating the measuring step with one or more distinct wavelength points of the sweep determined by a wavelength dependent transmission device to which the electromagnetic energy is directed.
- 11. The method of claim 10, said coordinating comprising directing electromagnetic energy through a gas cell.
- 12. The method of claim 10, said coordinating comprising directing electromagnetic energy to a Fabry Perot device.
- 13. A system for measuring electromagnetic energy from a device under test that is illuminated with electromagnetic energy at a wavelength that is swept over a range of wavelengths, comprising
a measuring system for measuring electromagnetic energy from the device under test, and a periodic wavelength reference having a detectable distinct response to a distinct wavelength of such electromagnetic energy to indicate to the measuring system occurrence of such distinct wavelength as a reference point to synchronize measurements with the sweeping of the wavelength of the electromagnetic energy.
- 14. The system of claim 13, said reference comprising a gas.
- 15. The system of claim 13, said reference comprising a Fabry Perot device.
- 16. The system of claim 13, further comprising a source of electromagnetic energy and wherein the wavelength of the source is swept in a known way over a range of wavelengths.
- 17. A light instrumentation system for measuring optical power or intensity of an input as wavelength of the input varies with respect to a time, comprising
a reference providing a detectable optical power or intensity upon encountering a wavelength having a prescribed value, and a detector system coordinated with the reference and providing a detectable feature for measuring the optical power or intensity.
- 18. An apparatus for coordinating a series of optical measurements of an object illuminated by a tunable or scanning light source, characterized in that the tunable light source illuminates the object over a number of wavelengths while measurements with respect to the object are made to obtain respective data points, and the tunable laser source illuminates a reference of which measurements are taken to provide wavelength reference points with which to coordinate the data points obtained by measurements of the object.
- 19. A method for coordinating a series of optical measurements of an object illuminated by a tunable or scanning light source, characterized in that the tunable light source illuminates the object over a number of wavelengths while measurements with respect to the object are made to obtain respective data points, and the tunable laser source illuminates a reference of which measurements are taken to provide wavelength reference points with which to coordinate the data points obtained by measurements of the object.
CROSS-REFERENCE TO THE RELATED APPLICATIONS
[0001] This application claims the benefit of U.S. Provisional Application Serial No. 60/265,297, filed Jan. 30, 2001.
Provisional Applications (1)
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Number |
Date |
Country |
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60265297 |
Jan 2001 |
US |